JAJSGT9G April 2010 – January 2019 DLP5500
Micromirror array temperature cannot be measured directly; therefore it must be computed analytically from measurement points (Figure 16), the package thermal resistance, the electrical power, and the illumination heat load. The relationship between micromirror array temperature and the case temperature are provided by Equation 1 and Equation 2:
An example calculation is provided below based on a traditional DLP Video projection system. The electrical power dissipation of the DMD is variable and depends on the voltages, data rates, and operating frequencies. The nominal electrical power dissipation to be used in the calculation is 2.0 Watts. Thus, QELE = 2.0 Watts. The absorbed power from the illumination source is variable and depends on the operating state of the mirrors and the intensity of the light source. It's based on modeling and measured data from DLP projection system.
For additional explanation of DMD Mechanical and Thermal calculations and considerations please refer to DLP Series-450 DMD and System Mounting Concepts (DLPA015).